Float preventer for looms



y 1932- v L. E. BLACKMAN 1,857,836

FLOAT PREVENTER FOR LOQMS Filed Dec. 24. 1929 4 Sheets-Sheet l LEfiZM(MM INVENTOR.

A TTORNEY.

' M y 10, 1932. L. E. BLACKMAN 1 857,836

FLQAT PREVENTER FOR LOOMS Filed Dec. 24, 1929 4 Sheets-Sheet 2 TTORNEY.

L. E. BLACKMAN FLOAT PREVENTER FOR LOOMS Filed Dec. 24, 1929 4Sheets-Sheet 3 I NVEN TOR.

A TTORNE Y.

May 10, 1932.

May 10, 1932. L. E. BLACKMAN FLOAT PREVENTER FOR LOOMS Filed Dec. 24,1929 4 Sheets-Sheet 4 A TTORNEY.

Patented May 10,1932 a.

rnnnnnonn. nnnoxmmornan'rsjvrnpn, SO U TI {CAROLI KAi e FLoArr PREVENT Rnon moms;

Application filed December '24, 1929. Serial No. 416,252.

.This invention relates to a float'preventer forlooms and moreespecially to an improvement in stop motion which is adapted toautomatically stop the loom when afloatoca curs. A float is defined asthe shuttlefailing to follow its proper course between the warp threads,due to thefact that when the warp becomes too taut in certain spots thatit will cause the shuttle to float on the wrong side of the warp andcause the respective threads to be woven improperly.

An object of my invention is to provide means for automatically stoppinga loom when the warp is tangled forany reason, 7

1 Another object of my invention is to pro-' vide means forautomatically stopping a loom when the take-up roll or the let-oflfrolldoes not function properly to preserve the proper tautnessin thewarp. My invention is adapted to cooperate with the regular stop motionon a loom, but as a regular stop motion on a loom does not function tostop the loom when the warp threads become too taut, but on the otherhand functions to stopthe loom when the warp threads become too loose orbecome broken. It is an object of my inventionto provide means adaptedto be associated with the regular stop mot-ionof the loom wherebythe'loom will be automatically stopped when the warp, threads become tootaut at any point therein. dueto any reason whatsoever, 7 1 Anotherobject of my invention 1s to provide means for automaticallystopping theloom when the shuttle is not. thrown clearanypomtr -NVhen the take-uproll stops operating the warp andcloth becomes loose and, therefore,stoppage of the loom will occur on account of the fact that the inertiaof the stop emot-ionmembers causes them to fly upwardly when they areraised'quickly and, therefore, operating to release one or more dropwires to stop the loom. V

Some ofthe objects of my invention having been stated other objectswillappear as the description proceeds, when taken in connection withthe accompanying drawings, in which v.-: e

Figure 1is a transverse View throughfa through the warp or flies out ofthe warp at loom showing my invention applied toone vtype of stop motionFigure2'1s a cross-sectional view through the stop motion mechanismshown in Figure l; 1 '5 Figure 3 is a perspective view of a specialbracket in which my stop motionmeans are 7 mounted; i i a I Figure/1 isacross-sectional view taken along ,the line 4-54 in Figure 1;

Figure 5 is a view looking from the righthand side of Figure 4;; r

Figure 6 is a perspective view of the upper portion vof Figure .4; r

Figure 7 is a perspective view ofone of the parts "of my stop motion;

Figure8 is a; perspective view of the drop wire in my stop motion; i

Figure 9 is:.a cross-sectional view taken alongtheline 9'9 in Figure 4;

Figure 10 is-a view similar to Figure 1 but showing a slightly differentform of stop motion applied to another type of loom;

Figure 11' is a cross-sectional view taken alongthe line 11-11 inFigurelO; V t

Figure 12 is a view of the upper left-hand corner of Figure 10; V V i VFigure 13 is an end view of Figure 12 looking from the line 13 -13 inFigure 12; Figure 14 is a perspective view of the drop wire in this typeof stop motion for float preventers;

Figure15 is a perspective view of the wire adapted torelease the dropwire;

Figure 16 is a perspective view of the mounting for the structure shownin Figures l4tlllfl15;' g Figure 17 is a view of the upper portion ofFigure 11 looking from the same sidebut on alarg'e scale; i

Figure 18'is a perspective View Of'the'up per central portion of Figure17 v V .Figtire 19 is aned'ge view of Figure 17 looking from theright-hand side thereof; Figure 20' is across-sectional view taken alongthe lineQO-ZO in Figure 19. Referring more-specifically to the drawingsthe numerals 10 and 11. indicate the framei portion of a loom and thenumeral 12 indicates a' transversely disposed bra ce'- bar e art this isa conventional type of stop-mo-M tion and has a plurality of drop wiresmounted thereon, which drop wires are not shown in this application, asthese drop wires are conventional, and there is onedrop'wire' for eachthread, and some of these drop wires are mounted on one of the sets ofmembers 13 and 14, and some are mounted on the othersets of members toprevent crowding the same all on one member as would be practicallyimpossible due to the great number ofwarp threads, at one end of themembers 13 and14 a conventional stop-motion mechanism is mountedand thiscomprises aslot 17 in the channel member 13 and the sliding notched bar14 has the member 18 pivotally secured thereto as at 19, and this member18 is pivotallysecured as at 20 to a member 21 which in turn has apivotal and sliding connection with the'feeler barv finger strip 21awhich is adapted to press against plunger fingers22, which pressesagainst. plunger 23 which is mounted in the flexible cable 24 and aplunger housing 25 is secured in a rocker or oscillating arm 26 which ispivotally mounted as at 27, and 'an oscillating lever 28 is connected toa rod 29 which extends to a portion of the loom .so as to give this acontinuousrocking motion. Theplunger bar 23 leads to the means forstopping a loom, and in mostinstances'this leads to the shipper levermechanism for stopping the loom. The-showing of the same is not deemednecessary as it is the conventional stop motion means in a'loom.

e The'mechanism thus far described is the conventional stop motion loom.mechanism on one type of loom,'and it is with this type "of mechanismthat I proposeto mount my float preventing means. These float preventingmeans are. shown in: Figure 4 wherein four identical float preventingmeans are shown as'being secured on the bar -12,= but I desire it to beunderstood that any number of float preventing means would operate suchas two or threeor five or any desired number located along the bar 12 aswill be later explained. s

My mechanism comprises: the bracket 30 which has the flange-31 thereon,through which holes" 32 appear and in these holes 32 screws 33'areplaced which penetrate threaded holes-in the bar 12 to secure thisbracket 30 in position. Thisbracket 30 has theupstanding portion; 34which has the channel portion 35 at oneved'ge thereof with a hole 36punched through the upper portion there of which hole is punched onthreesides and the'llip '37 is turnedoutw-ardly to form a pro- .portion42 and the cut-away portion 43 are presentin order to enable the channelbar 'l3 'and'the sliding bar 14 to occupy this space immediately beneatha cut-away portion 45 in a member 46 which is adapted to have theportion 47 normally in engagement with the inwardly sloping shoulder 40on the upper portion 34 of member 30. This-memher-'46 also has thedownwardly projecting portion;.48lwhich has an inwardly sloping shoulder:portion 49 to cause the same to properly engage the bars 13 and 14 whenthe same'is released from the member 37. This member 46 is slidablymounted along the surface 5001: the channel 35 and is held in positionloosely by means of guards 51 and member 41 is adapted to slide inchannel 35 and this member 41 has a projection 56 extending therefromwith the outwardly sloping-shoulder portion 57, said projection'56extendingthrough'the hole 36 inthe'channel portion 35, and this member.41 has aslot therein through which a rod 58 is adapted to pass, and thewarp threads 59 are adapted to passbeneath this rod-58 and when anyportion o'fthewarp threads becomes too taut for any reason, this red 58will be pulled upward- 1y tethe dotted line position 60 shown in Figure2, and this will raise member 41 and cause the member 56 thereon incooperation with shoulder 57 to raise the member 46 upwardly'and forceit off of the inwardly sloping shoulder portion 40 and causethc same tofall downwardly un-til the portion 45 engages the notches'15 and 16in'the relatively sliding members 13 and 14 to operate the conventionalstop-motion mechanism to stop the loom.

In Figures 10 to 20 inclusiveI' have shown, a slightly modified form ofmy invention as applied to another type of loom; Some looms have theserrated bar stop-motion as previously described which is known as the#17'Stopmotion, and other looms haven. differenttype'ofstop motion whichis operated by an oscillating barextending all-the way acrosstlIGlOOI'IIbBtWQGH fixed bars with transversely disposed bars, on whichthe drop wires of the conventional stop'motion are mounted, so'thatwhena thread breaks the drop wires will drop down between the fixed bar andthe ocsilla'ting bar and prevent its full swing and operate astopmot-ion mechanism, due to the fact that a cam on the drive shaft willfail to pass the projection assoto the member 115.

ciated with the oscillating bar and trip .the stop motion. This type ofstop motionxis shown in Figures 10 to 20, and I have shown- I show theconventional "drop wire mounted on oneof the transverse bars, and myinven-s tion mounted on the other of the transverse bars which will belater explained.

side frame members of the loom are indi-:- cated by the referencecharacters 101- and 102, and at the top of the frame members 101.

and 102 brackets extend inwardly in which bolts103 and 104 are secured,and on which bolts the bars which support my invention and also whichsupport the conventional drop wires are secured, which bars areindicated by the reference character 105, said bars having notches 106and 107 therein which areadapted to be engaged by said bolts to'hold thebar into position. The bars in the conventional stop motion areofapprox-imate-v ly the thickness of the point108 as shown in Figure 10,but on the bar which carries my float preventing means I cut out thecentral portion of this bar to allow vertical movement of rod 109without interfering with the conventional drop wires which are associated with this bar 105. Thisflrod 109 is mounted in brackets 110andlll which are secured to the bar 105 by means of screws 112 and 113,and these brackets 110 and 111 are:

. closed at their outer ends to prevent lateral movement of rod or wire109. Along the bar- 105 in addition to the regular drop wire mechanism Imount a plurality of my float :pre-

venting meanswhich consists of the member.

115 which has a hole 129 therein through which bar 105 passes. Thismember 115 has guides 116 and 11731711918011 and in the upper endthereof a portion 118 is punched out on three of its sides from themember 115- and is turned at a right angle to .115, and has an inwardlysloping shoulder portion 119 thereon.: On the other side of this member115 from that shown in Figure 16, I have the same crimped inwardly toform'a channel 120 which has the opened portion 121 to per; mit the bartoslide upwardly with relation In this channel 120. 1 mount the dropwire member 122 which has a hole 123 therethrough, through-which the bar105 passes. This elongated hole is- 0f greater height than the'bar 105so .as to allow vertical movement of member 122 with relation to bar105. .This member 122- also has a hole 124 therethrough, through whichthe wire 109 is adapted to pass. Thismember 122 near the upper endthereof has a portion 125 punched on three sides and bent at rightangles, and onthe upper end of this portion 125 we have the outwardlyslope ing shoulder 126. The drop wirei is slid;

ably-mountedbn the front face portion. of

the member1l5 as shownin Figure 16, and.

is encasedeby theretaining members 116 and 117. This-member 130 has theelongated slot 131 therein which is adapted to have the bar 105 and therod 109 passed therethrough, and this member 130 is adapted to have theupper portion 133 normally held on,- top of an-inwardly sloping shoulder119 tohold the --'sam'e in elevated POSltlOIl.- When the In thismodified form of my inventionthe' thread 1-34becomes too tautat anypoint:

along. the rod 109 it will pull the member 122 upwardlyand; will causethe shoulder 126 to raise member 130 upwardly above the top of theinwardly sloping shoulder 119 and.

the outwardly sloping shoulder 126 Will push this 5 member 130 outwardlyand cause the member 130.to drop downwardly between the stop motionmechanism which I shall now proceed to: describe. I y

This stop motion. mechanism consists of. thezfixedibars 142 and 143which are secured to the-lugs and'141 by. means of screws 144 and 145.The shaft 146 is mounted at its ends in bearings 148 and 149, and hasthe crank arms150 and lfilthereon, which are secured to. rods 153. 'and154 which are pivotally connected. to the-crank arms 150 and 15l-asat1-55 and156, said arms 153 and 154 projecting downwardly to theconventional stop, motion mechanism. The rod 146 has theupwardly'projecting arms thereon which are'integralwith the .serratedelongated bar 161. kThis bar 161. oscillates laterally and when-itihas'a-full swing over near the bars 142. and 143 it causes .a projectionwhich is not shown to swing clearofva cam on the main drive shaft, butwhenthe regular. stop motion drop wires or the float preventing wire-130drop downwardly between the bar 1.61and either. ofthe bars 142 or 143 itprevents this-bar 161 from oscillating its full stroke, and thereforecauses a portion of the mechanism associated. with rods 153 and 154- tobe engaged; by a cam on the main drive shaft which-pushes this mechanismaway from the-main drive shaft and operates I stop motion-mechanism tostop the loom by operatnigqn most instances the regular shipper lever. iT

In the, structureshown in Figures 1 to 9- ilar weights 162 on rod-109which act in the samemanneriasweights 62in the structilr shown'inFigures 1 to9 inclusive.

' tive sense only, andnotfor purposes otlimitation,--the scope of theinvention being set forth in the appended .claim I claimthe-conventional stop motion in a loom having conventional drop wires,means associatec'l with the conventional stop motion operable toautomatically drop one ofthe additional drop wires to-operate the stopmotion mechanism :when any portion of the warp between the dropwires andthe woven part of the fabric in the loom becomes inter- 1ningled.= r

2. In a loom, a stop motion, said stop-motion comprising a plurality ofnotched bars 'slidable with relation to each other, stop motionmechanism associated with said bars adaptedito stop the loom. when saidbars are m lockedftogether, conventional drop wires.

mounted on said bars, a plurality of other drop wires associated withsaid bars, means for raisingv the other drop wires, atransverselvdisposed rod passing throughthemeans tor raisingthe other drop wires,said trans- "ei-sely disposed rod being adapted to :pass immediatelyabove the -warp in the loom, said transverselydisposed rod when raisedbeing adapted tora'use at least one of the other drop wires to fall-andoperate the stop motion means when? any portion of the warpin'f'theloonrbecomestoo taut: r

3;. Inimfloat preventer tor looms-fa con vention a1 stop motioncomprising relatively movingnotched bars, a bracket member secured insaid looni and having a portion thereof extending in vertical aiinementwith a set of said stop motion bars, a vertically disposed channelmember in said bracket, a projection extendingirom one side of saidbracket. a drop wire adapted to be normally sustained in elevated.position by said projection, amember s lid'ably mounted in said channelmember and having-a projection extending through said bracket member andthrough said drop wire, said slidablemember mounted in said channelhaving ahole therein, a transversely disposed rod adapted to pene tratethe hole in said member .slidably mountedinsai d channel, said rod andsaid member associated therewith being adapted to be raisedwhentoo greata tension is applied to the warp to cause the drop wire to falldownwardly'to operate the stop motion mechanism. s

4. In a stop motion and float preventing mechanism in a loom, aplurality of transversely disposed bars insaid loom, an oscillating bar:mounted below said transversely disposed bars; two fixed bars mountedbelow said sets of bars, said oscillating bar being adapted to swing afull stroke, a plurality of drop wires mounted on said transverselydisposed bars and-adapted to be sustained in upward raised position bymeans ofthe tension of the warp, fsaid drop wires being adapted to. falldownwardly when a warp g V r thread becomes brokento prevent theoscill 1. Float preventive means in a loom com prising additionaldropwires assoclated with latinglmember from having afull swing to cause theloom tobe stopped, other means associated with said first named dropWires comprising a vertically disposed member on one of said bars,1avertically disposed channel member in said member, a drop wire adaptedto be normally sustained in raised position by a projection, a memberslidably mounted in said channel. and having a projection extending inclose proximity to the normally raised drop wire, atransverselydisposed'wire adapted to penetrate a hole in said slidable member, saidwire being adapted tohave the warp threads placed immediatelytherebeneath, said wire and sliding member being adapted to be raisedupwardly by an increased tension on the warp to cause the last nameddrop-wire to fall into the stop motion mechanism to stop the loom.

5. In aloom having a conventional stop motion of the oscillatingbartype, a plurality of transversely disposed bars having a plurality of.drop wires slidably. mounted thereomsaid drop'wires being adapted to beheldin raised position by the warp threads, a plurality of other dropwires slidably mounted on said transversely disposed bars, a pluralityotvertically sliding members mounted onsaid transversely disposed bars, atransverselydisposed rod adapted to penetrate this vertically slidingmember, said rod being adapted to be raisedupwardly by an increasedtension on the warp thread to release the other drop wires to allow themto drop downwardly and to operate the stop motion mechanism when anyportion of the warp threads have a tension exerted thereon which isabove the normal tension.

6. In .a stop motion mechanism for looms,

said stop motion mechanism, a plurality of drop wires and means forholding them .normally in elevated position, means operable by anincrease iii-the tension of any one of the Warp: tl1reads to cause saiddrop wires to fall downwardly to operate the stop motion mechanism. '7 r7. 1n a mechanical stop motion for looms, float pr venting mechanismassociated with said stop motion mechanism, said float preventingmechanism comprising a plurality ofdrop wiresnormally heldsin elevatedposition, a plurality of slidable members associated with said dropwires, a transversely disposed rod associated with said slidablemembers, said slidable ,members" and the transverselydisposed rod beingadapted-to a float preventing mechanism associated with be raisedupwardly by an increase in the tension of the warp thread to cause saiddrop wire to drop downwardly to operate the stop motion mechanism in theloom.

8. In a float preventer for looms, said float preventer being adapted tocooperate with the conventional mechanical stop motion in a loom, aplurality of vertically disposed guiding members associated with saidstop motion mechanism, a drop wire adapted to be held in elevatedposition by said guiding members, a sliding member mounted in each ofsaid guiding members, a transversely disposed rod associated with saidsliding members, said rod and at least one of said sliding members beingadapted to be raised upward- 1y by an increase in the tension of thewarp threads to cause the drop wires to be dislodged from their elevatedposition to fall downwardly to operate the conventional stop motionmechanism in the loom.

In testimony whereof I affix my signature.

LAURENCE E. BLAGKMAN.

